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gNo Model.) 2 Sheets-Sheet 1A W. B. SMITH.

AXLB BOX BEARING. No. 589,625. Patented Sept. 7,1897.

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(No Model.)

Patented Sept. 7,1897.

jnuenovw- UNrrnn STaTns PATENT @Tricia VlL-LIAM B. SMITH, OF NE7 YORK,il. Y.

AXLE-p-BOX BEARING.

SPECFICATION forming part of Letters Patent No. 589,625, dated September'7, 1897'.

Application filed March l0, 1897. Serial No. 626.702. (No modeli) ToctZZ when@ it muy concern.-

Be it known that I, TNILLIAM B. SMITH, of New York, in the county andState of New York, have invented a new and useful Improvement in AxledoxBearings, of which the following :is aspeciiication.

- My invention relates to an improvement in axle-box bearings, and moreparticularly to box-bearings for use in connection with railroad caraxles.

The object is to provide, in addition to the various provisions shown,described, and claimed in Letters Patent granted to me on January 20,1891, No. 44,943, a safety-stop to guard. against any possible bodilyshifting of 'the concave and convex faces of the bearing relative to oneanother' under any sudden or unusual impulse While at the same timeretaining all of the desirable features by Which the bearing-sectionsare permitted a suiiicient play to guard. against the overlapping orinjurious Wear which results from the irregular rotary movement of thespindle or its tilting movement.

A practical embodiment of my invention is represented in theaccompanying drawings, in which-- Figure l represents a verticaltransverse section through the spindle, the box, and bearings. Fig. 2 isa longitudinal section through the same. Fig. 3 is a 'View inperspective of the upper section of the bearing. Fig. et is a view inperspective of the middle section of the bearing, and Fig. 5 is a viewin perspective of the lower or brass section of the bearing.

In their general stru ctu rc and arrangement the several sections of thebearing, which for convenience I designate the outerj middie, and inneror brass sections, are quite similar to the parts shown and described inmy Letters Patent hereinabove referred to, the introduction of thesafety-stop being preferably accomplished by casting an elongated raisedsurface centrally on the face of the middle bearing-section and providethe concave face of the upper bearing-section with a correspondingrecess, the depression to receive the said elongated raised surfaceofthe middle section.

The axle is denoted by A; its spindle by a;

B, a box of any Well-known or approved forni, and C, D, and E,respectively, the upper, middle, and inner or brass sections of thebearing.

The inner or brass section is provided with a curved face c, extendinglongitudinally thereof and adapted to conform to the curve of thespindle or journal a. Its curved face is provided with a lead face e',as is usual, and at its opposite ends raised portions e2 extendoutwardly from its back to form retaining-shoulders for the middlesection D. Intermediate of the raised portions e2 there is a depressione3, curved laterally, and from this depressed portion cis lugs e4project for retaining the middle section in position thereon.

"lhe middle section D is formed of hard metal-cast-iron, for example-andis made of such length as to lit between the shoulders e2, its lowerface d being curved to t the curve of the depressed portion e3 of thebrass, and it is provided with perforations d, so located as to receivethe studs e4 therethrough.

The section D may be secured in position on the section E by upsettingthe ends of the studs ci.

The upper surface d2 of the section D is of curved form, the same beinga portion of the surface of a sphere, and in order to make such curvedsurface as long as possible and in the direction of the length of theaxle the up- Wardly-extended ends of the brass E are provided withcurved faced projections e5, which form a continuation of the surface d2of the section D.

The surface d2 has the bearing-surface between the sections C and l) ofthe bearing, and it is important that this should be extended as far aspossible in order to distribute the weight as evenly as may bethroughout the length of the brass E. The opposite sides of the sectionD lie in the extended planes of the sides of the brass and are centrallyprovided With rounded faced lugs d3, which stop short of the upper faceof the said section D, their upper ends (Z4 forming stops to prevent thelateral displacement of the bearing-sections under the side impulse ofthe spindleas, for example, when the brake is applied to the Wheel orunder the forward and backward jerking of the car. The opposite upperedges lOO of the section D are further cut away, as shown at d5, uponopposite sides of the lugs cl3 to allow the play of the bearing-sectionsin a horizontal plane and to prevent cramping.

The section C is provided with a flat upper face which lits against thetop of the box and with suitable recessed lugs c'and shoulders c forretaining the section securely in position when engaged with the lugs onthe inside of a box-such, for example, as those in ordinary use. Theunder face of the said section Gis provided with a curved 'faced recessc2, which corresponds to and is adapted to rest upon the convex curvedface (Z2 of the middle section D. At the opposite sides of vthe concaveface c2 the section C is provided with downwardly-projecting ribs orlips c3, the inner faces cl of which are curved convex toward the centerof the curved faces cAVL of the ribs or lips c3 and are adapted, whenthe parts are assemblcd, to overlap and engage the opposite sides of thesection D with the lower faces of the ribs or lips in proximity to theupper ends d'1 of the lugs d3.

As thus far described, the bearing is quite similar in its structure andfunctions to that shown, described, and claimed in my patent hereinabovereferred to.

My present invention is directed to providing against any possibledisplaeement'of the bearing-surfaces c2 and d? under a sudden andunusual jerking, and consists in providing the bearing-sections C and Dthe one with a projection and the other with an abutment, which willpermit them to play or rock in a horizontal plane the one with respectto the other without permitting them to become bodily displaced the onewith respect to the other.

The safety-stop, in its preferred form, is denoted by F and is castintegral with the section D. It rises a short distance from the face ofthe section D and is made to taper gradually from its extreme ends(denoted by i5 ff) toward its center f2, at which point its oppositesides are curved to form a central rounded bearing.

C to rock to a limited extent in a horizontal plane with respect to thestop F.

The stop and its recess are both hidden when the parts are assembled, sothat there is no liability of any clogging, and the elongation of thestop and its extended bearing against the walls of the recesses aresuflicient to obviate any liability of the stop becoming broken orinjured under any impulse to which the bearing may be subjected when inuse.

It is obvious that slight changes might be resorted to in the form andarrangement or' the parts without departing from the spirit and scopeofmy invention. Hence I do not. wish t-o limit myself strictly to thestructure herein shown and described; but

What I claim isl. The. combination with the bearing-scctions, the oneprovided with a convex surface and the other with a concave surfaceadapted to conform to and seat upon the said convex surface of theother, of a safety-stop fixed to and uprising from the convex surface ofone of the sections, the other of said bearing-sections being providedwith a recess in its concave surface to receive the stop on the othersection, the said stop being sufficiently smaller than the recess inwhich it seats to permit the sections to rock relatively to each otherin a horizontal plane, substantially as set forth.

2. The combination with the bearing-sections, the one provided with aconvex surface and the other with a concave surface adapted to conformto and seat upon the said convex surface of the other, of a safety-stopuprising` from the convex surface of the bearing-section, said stopbeing elongated and gradually narrowed in width from its opposite endstoward its central portion, the other of said bearing-sections beingprovided with a correspondingly-shaped recess in its curved face for thereception of said stop, the said recess being somewhat larger than thestop to permit a limited rocking of the sections relatively to eachother in a horizontal plane, su cstantially as set forth.

TVM. B. SMITH.

Witnesses:

FREDK. HAYNEs, M. E. FLETCHER.

